regression: Broken links in the UI when multiple links are used

[gabriellsh]

Proposed changes (including videos or screenshots)

Implements more test cases to ensure behaviour is correct.

Changes the regex that matches the URI schemes to not have the "global" property.

The issue was introduced here: #32917
For some reason, the change to the inlineMarked return is what broke the links. I did not find why that was the case, but reading domPurify's documentation and types, the default regex was found to not have the global property. Given the whole context, it was inferred that the issue happened due to regexes with the "global" flag set keeping an internal index after matching the text. If the same regex was being used to try to match multiple strings, some of them would not match due to the Regexe's dirty state.

Issue(s)

CORE-1160

Steps to test or reproduce

Further comments

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.95%. Comparing base (f26a496) to head (453c6ff).
Report is 1 commits behind head on release-7.7.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-7.7.0   #36063      +/-   ##
=================================================
+ Coverage          64.74%   64.95%   +0.21%     
=================================================
  Files               3110     3110              
  Lines              93179    93672     +493     
  Branches           17751    17801      +50     
=================================================
+ Hits               60332    60848     +516     
+ Misses             30059    30043      -16     
+ Partials            2788     2781       -7     

Flag	Coverage Δ
e2e	58.40% <100.00%> (+<0.01%)	⬆️
unit	71.67% <100.00%> (+0.14%)	⬆️

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